Feel disrespected by my bf a little

So my bf and I (29 and 24) have a very good active sex life. I noticed he is extremely horny and likes to masturbate a lot. Does it next to me, doesn’t bother me. Watches porn, doesn’t bother me bc I do too. What bothers me is I think he goes into the bathroom in MY apartment not ours, and watches porn to masturbate when I’m less than 10 ft away. Yesterday I had him stop because I was met with intense sharp cramps and stabbing pains in my rectum. I was sobbing. He consoled me and I laid down and he went to the bathroom, where I think he finished himself off. Cool no big deal I get it, it was a long week without sex. Later that night, he’s in the bathroom while I’m making dinner. The AC in my apt is loud and was running while he was in there, then it stopped, and I thought I heard cheeks clapping and moaning for a split second and then just silence. A few minutes later he comes out. I don’t mind the porn, I don’t mind the masturbating when I’m around. But the porn when he’s in MY home while I’m nearby bothers me. I would’ve lent a helping hand if he just asked.

He’s almost 30 you’d think he could control it? Idk how to bring it up without sounding like an attack but I feel very disrespected